'\" te
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.TH SLPFINDATTRS 3SLP "Jan 16, 2003"
.SH NAME
SLPFindAttrs \- return service attributes
.SH SYNOPSIS
.LP
.nf
cc [ \fIflag\fR... ] \fIfile\fR... \fB-lslp\fR [ \fIlibrary\fR... ]
#include <slp.h>

\fBSLPError\fR \fBSLPFindAttrs\fR(\fBSLPHandle\fR \fIhSLP\fR, \fBconst char *\fR\fIpcURL\fR,
     \fBconst char *\fR\fIpcScopeList\fR, \fBconst char *\fR\fIpcAttrIds\fR,
     \fBSLPAttrCallback *\fR\fIcallback\fR, \fBvoid *\fR\fIpvCookie\fR);
.fi

.SH DESCRIPTION
.sp
.LP
The \fBSLPFindAttrs()\fR function returns service attributes matching the
attribute tags for the  indicated full or partial \fBURL\fR.If \fIpcURL\fR is a
complete \fBURL\fR, the attribute information returned is for that particular
service in the language  locale of the  \fBSLPHandle\fR. If \fIpcURL\fR is a
service type, then all attributes for the service type  are returned,
regardless of the language of registration. Results are returned through the
\fIcallback\fR parameter.
.sp
.LP
The result is filtered  with an \fBSLP\fR attribute  request  filter  string
parameter,  the  syntax  of  which  is  described  in  \fIRFC 2608\fR.  If  the
filter string is  the empty string,  \fB""\fR,  all  attributes are returned.
.sp
.LP
If an error occurs in starting the operation, one of the \fBSLPError\fR codes
is returned.
.SH PARAMETERS
.sp
.ne 2
.na
\fB\fIhSLP\fR\fR
.ad
.RS 15n
The language-specific \fBSLPHandle\fR on which to  search for attributes. It
cannot  be \fINULL\fR.
.RE

.sp
.ne 2
.na
\fB\fIpcURL\fR\fR
.ad
.RS 15n
The full or partial \fBURL\fR. See \fIRFC 2608\fR for partial \fBURL\fR syntax.
It cannot  be \fINULL\fR.
.RE

.sp
.ne 2
.na
\fB\fIpcScopeList\fR\fR
.ad
.RS 15n
A pointer to a \fBchar\fR containing a comma-separated  list  of scope names.
It cannot  be \fINULL\fR or an empty string, \fB""\fR.
.RE

.sp
.ne 2
.na
\fB\fIpcAttrIds\fR\fR
.ad
.RS 15n
The filter  string indicating  which attribute  values to  return. Use  empty
string \fB""\fR  to indicate all values.  Wildcards matching  all attribute ids
having  a particular prefix or suffix are also possible. It cannot be
\fINULL\fR.
.RE

.sp
.ne 2
.na
\fB\fIcallback\fR\fR
.ad
.RS 15n
A callback function through which the results of the operation are reported. It
cannot be \fINULL\fR.
.RE

.sp
.ne 2
.na
\fB\fIpvCookie\fR\fR
.ad
.RS 15n
Memory passed to the callback code from the client. It may be \fINULL\fR.
.RE

.SH ERRORS
.sp
.LP
This function or its callback may return any \fBSLP\fR error code. See the
ERRORS section in \fBslp_api\fR(3SLP).
.SH EXAMPLES
.LP
\fBExample 1 \fRReturning Service Attributes for a Specific \fBURL\fR
.sp
.LP
Use the following example to return the attributes "\fBlocation\fR" and
"\fBdpi\fR" for the \fBURL \fR"\fBservice:printer:lpr://serv/queue1\fR" through
the callback \fBattrReturn\fR:

.sp
.in +2
.nf
SLPHandle hSLP;
SLPAttrCallback attrReturn;
SLPError err;

err = SLPFindAttrs(hSLP "service:printer:lpr://serv/queue1",
     "default", "location,dpi", attrReturn, err);
.fi
.in -2

.LP
\fBExample 2 \fRReturning Service Attributes for All \fBURL\fRs of a Specific
Type
.sp
.LP
Use the following example to return the attributes "\fBlocation\fR" and
"\fBdpi\fR" for all service \fBURL\fRs having type "\fBservice:printer:lpr\fR":

.sp
.in +2
.nf
err = SLPFindAttrs(hSLP, "service:printer:lpr",
     "default", "location, pi",
     attrReturn, NULL);
.fi
.in -2

.SH ENVIRONMENT VARIABLES
.sp
.ne 2
.na
\fB\fBSLP_CONF_FILE\fR\fR
.ad
.RS 17n
When set, use this file for configuration.
.RE

.SH SEE ALSO
.sp
.LP
.BR slp_api (3SLP),
.BR slp.conf (5),
.BR slpd.reg (5),
.BR attributes (7),
.BR slpd (8)
.sp
.LP
\fISystem Administration Guide: Network Services\fR
.sp
.LP
Kempf, J. and Guttman, E. \fIRFC 2614, An API for Service Location\fR. The
Internet Society. June 1999.
